And the winner for most popular game on Facebook in October is ... (drumroll, please!) ... FarmVille. The farm-simulation is still attracting players in droves, bringing in 11 million people in the past month for a whopping total of 63 million users. Zynga's restaurant simulation game, Cafe World, went from zero users to 27 million in a single month and Happy Aquarium went from zero to 22.5 million users in a month.